You can now monitor your AWS IoT Things Graph workflows using AWS CloudWatch metrics. You can collect metrics for workflow steps that are executed by AWS IoT Things Graph, including success count, failure count, and total count and then set alarm thresholds for each of these metrics within AWS CloudWatch.  For example, you can set alarms that watch for the number of flows that have failed, and send notifications to a downstream application or to an operator.

With Amazon EMR release 5.27.0, you can now reconfigure your multi-master clusters on the fly, without needing to recreate your cluster. EMR 5.23 added the capability to run multiple master nodes, helping you protect your long running clusters that run important data pipelines, streaming applications, or HBase clusters from the potential loss of a master node. EMR also gives you the ability to reconfigure running clusters, giving you the ability to change configuration using the EMR console, CLI, and SDK. With EMR release 5.27.0, you can now reconfigure your running multiple master node clusters, allowing you to easily change the EMR application configuration in your running cluster without having to recreate it.

Amazon Neptune now supports Streams, an easy way to capture changes in your graph. When enabled, Neptune Streams logs changes to your graph (change-log data) as they happen. Neptune Streams are useful when you want to notify processes (e.g. trigger a lambda) as changes occur in your graph. Streams can also be useful to maintain a current version of your graph in a different region or service such as Amazon Elasticsearch, Amazon ElastiCache, or Amazon Simple Storage Service.

AWS Certificate Manager (ACM) Private Certificate Authority (CA) is now available in the Middle East (Bahrain) region. This regional expansion extends the availability of ACM PrivateCA across the globe, increasing the number of regions to 19.

Amazon DocumentDB (with MongoDB compatibility) is a fast, scalable, highly available, and fully managed document database service that supports MongoDB workloads. 

AWS RoboMaker now supports Robot Operating System 2 (ROS2) feature in beta release. ROS2 expands ROS’s use cases with increased security, quality of service, support for embedded systems and real-time scenarios.

You can now view visualizations of past pipeline executions in AWS CodePipeline. Previously, you were only able to see information about actions that ran in a failed pipeline execution. Now, when an execution fails, you will also see the actions that did not run enabling easier debugging of pipeline failures. When your pipeline has concurrent executions, you are now able to view visualizations of the individual executions making understanding the status of an execution much simpler.

Amazon Elastic Kubernetes Service (EKS) is now available in the AWS São Paulo region (sa-east-1). 

Amazon Chime users can now screen share from Mozilla Firefox or Google Chrome without installing any extensions or downloading a plug-in on Microsoft Windows, macOS, Linux and Chrome OS desktop devices. Chime now leverages the Web APIs available in Mozilla Firefox version 66 and higher or Google Chrome version 72 and higher to deliver native screen share capabilities. In three clicks, any attendee using these browsers can join a Chime meeting and start sharing an application window or the entire screen with other participants. There is no need for pre-meeting testing or setup as all attendees, even those that work in highly regulated environments and are blocked from making changes to their devices, can now share content during Chime meetings without the need for IT intervention. 

Amazon Neptune now supports SPARQL 1.1 Federated Query , a World Wide Web Consortium (W3C) Recommendation. Using Neptune customers can execute a portion of their query across different SPARQL endpoints within their Virtual Private Cloud (VPC), combine the result, and return to the user. Now customers can distribute their data across multiple Neptune clusters and using a single query to access that data across those clusters. Customers can also use federation to combine data in Neptune with data from external SPARQL endpoints.